GST Notice REG-23: What It Means, How to Reply, and What Happens If It Is Rejected

When the CBIC’s 2023 enforcement drive cancelled 4,972 GSTINs and detected Rs. 15,035 crore in evasion (Tribune India, July 2023), thousands of those businesses filed revocation applications in Form GST REG-21 to reclaim their cancelled registrations. Not all of them succeeded on the first attempt. Where the Proper Officer finds a revocation application deficient, either on compliance grounds or on substance, they cannot simply reject it outright. Under Rule 23 of the CGST Rules 2017, the officer must first issue a show cause notice in Form GST REG-23, giving the taxpayer one final opportunity to clarify and supplement their case before a formal rejection order is passed in Form REG-05. REG-23 is the last gate between a cancelled business and permanent GSTIN loss. You have 7 working days to file a reply via Form GST REG-24. This guide explains every scenario that triggers REG-23, precisely what to include in your REG-24 reply, and what appeal options exist if the officer passes a REG-05 rejection despite your reply.

What Is Form GST REG-23 and Why Did You Receive It?

Form GST REG-23 is a show cause notice issued by the Proper Officer under Rule 23 of the CGST Rules 2017, read with Section 30 of the CGST Act 2017. It arises exclusively in the context of revocation of cancellation: after a taxpayer’s GST registration has been cancelled by a REG-19 order and the taxpayer applies for revocation via Form REG-21, the Proper Officer issues REG-23 if they are not satisfied with the revocation application and propose to reject it. REG-23 is not a standalone cancellation notice; it is a procedural safeguard within the revocation process, mandated by the natural justice principle of audi alteram partem (hear the other side). No Proper Officer can issue a REG-05 final rejection of a revocation application without first issuing REG-23 and receiving a reply.

You will receive REG-23 after you have already: (1) had your GST registration cancelled via Form REG-19 following a REG-17 show cause notice; (2) applied for revocation of that cancellation using Form REG-21; and (3) the Proper Officer reviewed your REG-21 application and found it insufficient or incomplete. The notice appears on your GST portal under Services > User Services > View Notices and Orders, with SMS and email alerts to your registered contact. The 7-working-day reply clock begins from the date the notice appears on the portal.

The Complete Cancellation and Revocation Journey

What Are the Common Reasons a REG-23 Is Issued After Your REG-21?

Officers issue REG-23 for substantive and procedural reasons. In over 60% of cases, the trigger is a compliance gap that the taxpayer could have addressed before filing REG-21. Understanding the specific reason stated in your REG-23 is the single most important step: your REG-24 reply must address that exact reason with documentary proof, not offer a generic response.

1. Pending Returns Still Outstanding

The portal requires all pending returns to be filed before a REG-21 application is even accepted. However, if returns were filed in a different period than what the officer expected, or if a return was filed but the payment failed, the system may still show dues. The officer issues REG-23 asking why outstanding returns for specific tax periods remain unfiled. Resolution: file any genuinely remaining returns immediately, clear all late fees, and attach ARN numbers and challan references in REG-24.

2. Outstanding Tax, Interest, or Late Fee Dues

Filing returns without paying the full tax, interest (18% per annum), and applicable late fees results in a REG-23 citing outstanding liability. The portal’s blocking mechanism for REG-21 filing is based on returns filed, not on payment cleared, which means a taxpayer can technically file REG-21 with dues still outstanding. When the officer reviews the application and finds unpaid dues in the liability register, REG-23 is issued. Pay all dues in full before responding to REG-23 and attach payment challan (CIN) references explicitly in REG-24.

3. Aadhaar Authentication Incomplete

Section 25(6A) of the CGST Act requires Aadhaar authentication for GST registration and revocation. If the Aadhaar OTP-based authentication of the proprietor, managing partner, karta, or authorised director was not completed before or at the time of filing REG-21, the officer will cite this as a ground in REG-23. Complete the authentication through the portal immediately and attach the authentication completion confirmation in REG-24.

4. Bank Account Details Not Updated (Rule 10A Violation)

Where the original cancellation under REG-17 was initiated under Section 29(2)(d) for failure to furnish valid bank account details under Rule 10A, the officer issuing REG-23 expects to see proof that a valid bank account has now been linked to the GSTIN. A REG-21 that does not address the root cause of cancellation will invariably trigger REG-23. Furnish a cancelled cheque, bank statement, and the portal acknowledgement of the bank account update in REG-24.

5. Inadequate Evidence for Non-Filing or Address Grounds

For cancellations under clauses (a) or (i) of Section 29(2) (non-existent address or prolonged non-filing), the officer may have conducted a physical verification before or after REG-19 that found the premises unoccupied. If REG-21 was filed without addressing the address issue, or if the premises evidence in REG-21 was weak (only utility bills, no active business proof), REG-23 is issued seeking stronger evidence of genuine business operations. In REG-24, provide geo-tagged photographs of the premises with a date stamp, an active lease or ownership document, and bank statements showing GST-linked transactions at that address.

6. Fraud or Fake-Invoice Grounds Require Substantive Rebuttal

For cancellations under clauses (b) or (k) of Section 29(2), that is, issuing invoices without actual supply or obtaining registration by fraud, the Proper Officer needs significantly more than return filing to be satisfied. Filing all returns after a fraud-ground cancellation demonstrates compliance intent but does not rebut the substantive allegation. REG-23 in these cases will ask the taxpayer to produce books of accounts, delivery records, bank transaction confirmations matching invoiced amounts, and evidence that the impugned transactions were genuine. This is the most difficult REG-23 category and almost always requires a qualified GST practitioner to prepare the REG-24 reply.

How Do You Reply to REG-23 Using Form GST REG-24?

Form GST REG-24 is the statutory reply mechanism to a REG-23 notice. It must be filed on the GST portal within 7 working days of receiving REG-23. Unlike GSTR-3A or REG-17 replies, which are available under clearly labelled portal paths, REG-24 is accessed through the same “Reply” button on the specific REG-23 notice in your Notices and Orders section. There is no separate menu item for REG-24. Filing outside the 7-working-day window without prior extension gives the officer grounds to pass an ex parte REG-05 rejection.

1. Read and document the REG-23 notice in full. Download the PDF of the REG-23 from the portal and list every specific ground or deficiency mentioned. REG-23 notices vary significantly in specificity: some cite the exact tax period and amount outstanding; others raise broader concerns about business activity. Your REG-24 reply must respond to every point individually. A general declaration of compliance will not suffice.
2. Resolve outstanding compliance before drafting the reply. Before writing a single line of REG-24, address the root issue: file pending returns, pay all dues including interest and late fees, complete Aadhaar authentication, update bank account on portal, or compile the documentary evidence required. Attaching proof of post-REG-23 compliance strengthens REG-24 far more than arguments about why the deficiency occurred.
3. Structure your REG-24 reply point by point. For each ground raised in REG-23, write a specific reply paragraph: (a) acknowledge the ground; (b) state the remedial action taken with date; (c) cite the attached document number. Example: “Ground 1 of REG-23 cites non-filing of GSTR-3B for April 2024 to September 2024. All six returns have now been filed as of [date]. ARN numbers and payment challans are attached as Annexure A.”
4. Request a personal hearing. GST law provides a right to a personal hearing before an adverse order is passed. Add an explicit line in REG-24: “The Applicant respectfully requests a personal hearing under Section 75(4) of the CGST Act 2017 before any order adverse to the Applicant is passed.” Officers are more likely to grant revocation after a personal hearing where the taxpayer or their authorised representative can address questions directly.
5. Upload all supporting documents as PDF attachments. The GST portal allows file uploads with REG-24. Upload every document referenced in your reply: return filing ARNs, payment challans, geo-tagged photographs, lease agreements, bank statements, book extracts, third-party confirmations, CA certificates. Label each attachment clearly with an exhibit or annexure number corresponding to the reply text.
6. Submit REG-24 and save the acknowledgement. After submission, download and save the system-generated acknowledgement number with the timestamp. This is your proof of timely filing. Monitor your portal status daily for the officer’s response.

What Documents Should You Include With Your REG-24 Reply?

The documents required in REG-24 depend entirely on the ground for the original REG-17 cancellation and the specific deficiency cited in REG-23. A document list that addresses the wrong ground will be dismissed. The table below maps the cancellation ground to the documentary evidence that officers consistently find persuasive in revocation decisions.

What Happens After You File REG-24?

After you file Form REG-24, the Proper Officer reviews your reply and supporting documents. There is no statutory time limit within which the officer must act after REG-24 (unlike the 30-day period for processing the initial REG-21 application). In practice, officers resolve most REG-24 replies within 15 to 45 days. Two outcomes are possible.

Outcome 1: Revocation Granted (Form REG-22)

If the officer is satisfied with your REG-24 reply, they issue Form GST REG-22, the order granting revocation of cancellation. Your GSTIN is reactivated with effect from the date specified in REG-22. Reactivation is usually retrospective to the date of your REG-21 application, though some officers specify the REG-22 issue date. Check the effective date in REG-22 carefully: if the reactivation date is the REG-22 date rather than REG-21 date, this creates a gap period where your GSTIN was cancelled, during which your buyers cannot claim ITC on invoices you issued. Challenge any such gap at the personal hearing stage or immediately after REG-22 is issued. Once REG-22 is issued, update your authorised signatory details if needed and verify that your GSTIN status shows “Active” on the CBIC portal before issuing new tax invoices.

Outcome 2: Final Rejection (Form REG-05)

If the officer is not satisfied with your REG-24 reply, they pass a final rejection order in Form REG-05. This ends the revocation process at the officer level. The REG-05 order must state the specific reasons for rejection; an order that merely says “reply not satisfactory” without particularising why is legally deficient and susceptible to challenge. Once REG-05 is issued, your GSTIN remains cancelled and you must decide within 3 months whether to appeal under Section 107 of the CGST Act. There is no further application for revocation available after REG-05: the only paths forward are the appeal hierarchy or applying for a fresh GST registration.

What If the Officer Takes No Action After REG-24?

If the officer takes no action for a prolonged period after you file REG-24, this does not automatically mean your revocation is granted (unlike the deemed-approval under Rule 9(5) for new registration applications). However, inaction while your GSTIN remains suspended or cancelled causes demonstrable business harm. After 45 days without response, send a written reminder to your jurisdictional Assistant/Deputy Commissioner, referencing the REG-24 acknowledgement number and requesting a personal hearing. If no response follows within a further 15 days, a writ petition before the High Court under Article 226 citing undue administrative delay is a well-established remedy that typically produces a response within weeks.

How Do You Appeal a REG-05 Final Rejection?

A REG-05 final rejection of a revocation application is an appealable order under Section 107 of the CGST Act 2017. The appeal hierarchy gives you three successive tiers plus a constitutional remedy before the High Court. The table below outlines each tier, the time limit, and the pre-deposit requirement.

When a Writ Petition Is More Effective Than a Statutory Appeal

For REG-05 rejections that are procedurally defective, the writ petition route under Article 226 is often faster and more effective than the statutory appeal chain. Courts have consistently set aside REG-05 orders where: (a) the REG-23 notice itself was vague and did not state specific grounds; (b) the officer refused to grant a personal hearing despite an explicit request in REG-24; (c) the REG-05 order did not give reasons specific enough for the taxpayer to understand what was lacking; or (d) the officer ignored documentary evidence filed with REG-24 without explanation. Multiple High Courts have restored GSTINs directly by writ without requiring the taxpayer to first exhaust the Section 107 appeal. If your REG-05 order falls into any of these categories, consult a GST writ litigator, not just a GST compliance practitioner.

Fresh Registration as an Alternative to Appeal

Where a taxpayer’s business operations must resume urgently and an appeal would take months, applying for a fresh GST registration under Section 22 or 24 of the CGST Act is a parallel option. A fresh registration is available to any entity that meets the threshold requirements, even if an earlier GSTIN was cancelled for non-compliance. However, if the cancellation was for fraud or evasion grounds, officers may flag the new registration application for enhanced scrutiny or issue a REG-3 clarification notice. Our REG-3 registration notice guide explains how to handle that scenario. For businesses considering restructuring after GSTIN loss, our Pvt Ltd company registration guide covers the compliance advantages of operating under a corporate entity rather than a sole proprietorship or partnership.

How Can You Avoid Getting a REG-23 by Filing a Strong REG-21?

The most effective strategy for navigating the revocation process is to file such a complete and well-documented REG-21 application that the officer has no grounds to issue REG-23 in the first place. Most REG-23 notices reflect a preventable deficiency in the REG-21 filing, not an inherent officer bias against restoration. Across all cancellation categories, the following checklist covers the steps that eliminate the most common REG-23 triggers.

Before Filing REG-21: The Mandatory Compliance Checklist

• File ALL pending returns, including GSTR-1, GSTR-3B, and GSTR-9 (annual) for every open period, not just the periods for which you received the original GSTR-3A notices. Even a single missed return for a period outside the REG-17 scope will block or defect the REG-21.
• Pay ALL outstanding tax, interest, and late fees and take a screenshot of your “nil outstanding” status in the GST portal’s liability ledger. This screenshot should be attached as the first exhibit in your REG-21 application.
• Complete Aadhaar authentication of the proprietor, all partners, or all authorised directors before submitting REG-21. Authentication that fails OTP verification can be re-attempted; if biometric authentication is required, visit an authorised GST Seva Kendra.
• Update and validate bank account details if Rule 10A non-compliance was part of the original cancellation ground. The portal will not accept REG-21 without a valid linked bank account for most cancellation categories.
• Attach documentary proof of ongoing business activity proactively. Even if the REG-23 ground was only return non-filing, attaching 2 to 3 months of current bank statements, recent purchase invoices, and a current electricity or lease bill pre-empts any address or business-activity challenge.
• Include a declaration letter from the proprietor, managing partner, or authorised director confirming: (a) the cause of the original non-compliance; (b) the steps taken to rectify it; and (c) the commitment to ongoing compliance. A signed declaration with personal liability acknowledgement demonstrates intent and is increasingly common in applications that avoid REG-23.
• For composition scheme taxpayers who received a cancellation through both a CMP-05 notice and a REG-17: address the composition scheme violation specifically in REG-21, including whether you intend to continue as a composition dealer or migrate to the regular scheme. An REG-21 that is silent on composition scheme status after a CMP-05-triggered cancellation will draw a REG-23.

Frequently Asked Questions on GST REG-23 Notice